Magnet for separating iron chips



(Model.)

Gr. E. BOWERS. Magnet for Separating Iron Chips.

Patented May- 3 INVENTOR l x.) zw/M ATTORNEYS WITNESSES NETERS, PHOTU-LITHGGRAPNEH, WASHINGTON, D C.

tra i GEORGE E. BOWERS, OF FITCHBURG, MASSACHUSETTS.

MAGNET FOR SEPARATlNG IRON CHIPS.

SPECIFICATION forming part of Letters Patent No. 240,956, dated May 3, 1881.

Application filed August 2, 1880.

T o all 'whom zt mcy concern:

Be it known that I, GEORGE E. BOWERS, of Fitchburg, Worcester county, State ot' Massa-- chusetts, have invented a new and useful [mprovement in h/Iagnets for Separating Iron Chips, oi' which the following is a specication.

Permanent magnets have. heretofore been used for separating particles and chips ot' iron from lathe-turnings; but such magnets are ot' limited power and become less powerful by use. Further than this, a brush is required for separati-ng the iron from the magnet.

The object ot" my invention is to obtain a powerful magnet for the pu-rposes named, and to save the time and labor required generally for removing the chips from the magnet.

My invention consists in amagnet having a straight core and helices wound in oppositedireetions inclosed in a tube or hollow cylinder thatis attached to one pole ot' the magnet, and also provided with a switch7 whereby the direction ot' the current around a portion of the magnet can be reversed, so as to demagnatize the core and cylinder and thereby release the chips.

ln the accompanying drawings, forming a part ot' this specitication, Figure l is a longitudinal section ot' my improved magnet. Fig. 2 is an end view, showing the reversing-switch; and Fig. 3 is a cross-section on line wx, Fig. l.

Similar letters ot' reference indicate corresponding parts.

A is the core oi' the magnet fitted with a wooden spool, a, around which is the main helix`b and ,also the smaller helix c, wound in reverse direction. One end of each helix is connected with core A, while their other ends extend beneath opposite ends ot' key d, that is hung on an insulated support, e, at one end of (Model.)

the magnet. Thekeycl carriesa binding-post, j', and by a spring, g, is held normally iu contact with the end ot' main helix b. The other binding-post. lt, is in connection with the core.

B is a metal tube surrounding the two helices and attached to the S-pole of the core.

This form of magnet gives extended surface for adherence ol' the particles ot' iron and suil ieient power, as required.

By pressing down keyd thecireuit is broken in the main helix b, and established in the small helix, thereby demagnatizing the core and tube so that the chips can drop from the magnet by gravity. The small helix is sufficiently large to neutralize the residual mag"- netism without instantly inducing magnetism ofsutlicient strength to prevent the chipsfrom l'alling.

By a magnet ot' this construction iron chips can be readily separated from brass and other particles and the work done rapidly.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. The insulated key d and bindingpost f, combined with a magnet having helices b c wound in opposite directions, and inclosingtube B, substantially as and for the purposes set forth.

2. An electro-magnet for separating iron chips from other materials, consisting of the the central core, A, the helices I) c, wound in opposite directions, the inclosing-tube B, the key d, and the binding-posts fh, substantially as herein shown and described.

GEORGE EGBERT BOWERS.

Witnesses:

W ILLIAM O. KELLEY, A. E. HorroN. 

